<template>
  <div>
    <h1>当前求和为：{{ sum }}</h1>
    <h1>当前求和放大10倍为：{{ bigSum }}</h1>
    <h1>我在{{ school }},学习{{ subject }}</h1>
    <select v-model.number="n">
      <option value="1">1</option>
      <option value="2">2</option>
      <option value="3">3</option>
    </select>
    <button @click="increment">+</button>
    <button @click="decrement">-</button>
    <button @click="incrementOdd">当前求和为奇数再加</button>
    <button @click="incrementWait">等一等再加</button>
  </div>
</template>

<script>
import {mapState, mapGetters} from 'vuex'

export default {
  // eslint-disable-next-line vue/multi-word-component-names
  name: 'Count',
  data() {
    return {
      n: 1, //用户选择的数字
    }
  },
  computed: {
    //靠程序员自己亲自去写计算属性
    // sum() {
    //   return this.$store.state.sum
    // },
    // school() {
    //   return this.$store.state.school
    // },
    // subject() {
    //   return this.$store.state.subject
    // },
    // bigSum() {
    //   return this.$store.getters.bigSum
    // }


    // 借助mapState生成计算属性（数组写法）
    ...mapState(['sum', 'school', 'subject']),
    // 借助mapState生成计算属性（对象写法）
    // ...mapState({sum: 'sum', school: 'school', subject: 'subject'}),

    // 借助mapGetters生成计算属性（数组写法）
    ...mapGetters(['bigSum'])
    // 借助mapGetters生成计算属性（对象写法）
    // ...mapGetters({bigSum: 'bigSum'})
  },
  methods: {
    increment() {
      this.$store.commit('ADD', this.n)
    },
    decrement() {
      this.$store.commit('SUBTRACT', this.n)
    },
    incrementOdd() {
      this.$store.dispatch('addOdd', this.n)
    },
    incrementWait() {
      this.$store.dispatch('addWait', this.n)
    },
  },
}
</script>

<style>
button {
  margin-left: 5px;
}
</style>
